Change pack
Lintel Feb 16 - 22 25 questions
PDF (questions) PDF (answers)

Monday 16 February 2026

Keystones #47 · Five questions · Open this day only

  1. 1. Number

    0.0046

    Answer: 4.6 × 10-3
  2. 2. Algebra

    Factorise: x² + x - 6

    Answer: (x + 3)(x - 2)
  3. 3. Geometry

    Hypotenuse = 31cm, angle = 52°. Find adjacent side

    Answer: 19.cm
  4. 4. Ratio

    Simplify: 4:4:6

    Answer: 2:2:3
  5. 5. Statistics

    The mean of 5 numbers is 30. If 4 of them are 19, 29, 15, 45, what is the missing number?

    Answer: 42

Tuesday 17 February 2026

Keystones #48 · Five questions · Open this day only

  1. 1. Number

    43000

    Answer: 4.3 × 104
  2. 2. Algebra

    Factorise: x² - 9x + 20

    Answer: (x - 5)(x - 4)
  3. 3. Geometry

    Adjacent = 12cm, angle = 30°. Find opposite

    Answer: 6.9cm
  4. 4. Ratio

    Simplify: 6:12:8

    Answer: 3:6:4
  5. 5. Statistics

    Calculate the mean of: 28, 48, 42, 50, 16, 31, 6

    Answer: 31.6

Wednesday 18 February 2026

Keystones #49 · Five questions · Open this day only

  1. 1. Number

    5500000

    Answer: 5.5 × 106
  2. 2. Algebra

    Factorise: x² - 6x + 8

    Answer: (x - 4)(x - 2)
  3. 3. Geometry

    Adjacent = 18cm, angle = 32°. Find opposite

    Answer: 11.2cm
  4. 4. Ratio

    Express the first part of 2:6 as a fraction in simplest form

    Answer: 1⁄4
  5. 5. Statistics

    Calculate the mean of: 47, 31, 37, 27, 47, 19, 11, 22

    Answer: 30.1

Thursday 19 February 2026

Keystones #50 · Five questions · Open this day only

  1. 1. Number

    0.05

    Answer: 5 × 10-2
  2. 2. Algebra

    Factorise: x² + x - 2

    Answer: (x + 2)(x - 1)
  3. 3. Geometry

    Hypotenuse = 16cm, angle = 44°. Find adjacent side

    Answer: 11.5cm
  4. 4. Ratio

    Divide 208 in the ratio 1:2:1

    Answer: 52, 104 and 52
  5. 5. Statistics

    The mean of 4 numbers is 40. If 3 of them are 30, 38, 31, what is the missing number?

    Answer: 61

Friday 20 February 2026

Keystones #51 · Five questions · Open this day only

  1. 1. Number

    720000

    Answer: 7.2 × 105
  2. 2. Algebra

    Factorise: x² + 3x - 40

    Answer: (x + 8)(x - 5)
  3. 3. Geometry

    Adjacent = 18cm, angle = 49°. Find opposite

    Answer: 20.7cm
  4. 4. Ratio

    Express the first part of 5:2 as a fraction in simplest form

    Answer: 5⁄7
  5. 5. Statistics

    Calculate the mean of: 40, 35, 48, 34, 20, 21, 5, 18

    Answer: 27.6